2000A&A...363..117K

Query : 2000A&A...363..117K

2000A&A...363..117K - Astronomy and Astrophysics, volume 363117-129 (2000/11-1)

Dwarf spheroidal galaxies in the M 81 group imaged with WFPC2.

KARACHENTSEV I.D., KARACHENTSEVA V.E., DOLPHIN A.E., GEISLER D., GREBEL E.K., GUHATHAKURTA P., HODGE P.W., SARAJEDINI A., SEITZER P. and SHARINA M.E.

Abstract (from CDS):

We obtained HST/WFPC2 images of the dwarf spheroidal (dSph) galaxies K 61, K 63, K 64, DDO 78, BK 6N, and kk 77 in the M 81 group. Our color-magnitude diagrams show red giant branches with tips (TRGB) falling within the range of I=[23.8-24.0]mag. The derived true distance moduli (DM) of the 6 dSphs ranging from 27.71 to 27.93mag are consistent with their membership in the group. Given accurate distances of 5 other group members, which have been derived via TRGB or cepheids, the mean DM of the M81 group is (27.84±0.05) mag. We find the difference of the mean distances to the M81 and NGC 2403 groups to be DM81-DNGC2403=(0.5±0.2)Mpc, which yields a deprojected separation of 0.9Mpc. With respect to the Local group, M 81 and NGC 2403 have radial velocities of 106 and 267km/s respectively, while the velocities of the group centroids are 142 and 281km/s. The higher velocity of the closer system may indicate that these groups are moving towards each other, similar to the Milky Way and M 31 in the Local group. Several globular cluster candidates have been identified in the galaxies.

Abstract Copyright: ∼

Journal keyword(s): galaxies: dwarf - galaxies: individual: M 81 group - galaxies: photometry

Simbad objects: 54

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Number of rows : 54
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
2 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
3 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
4 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
5 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
6 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
7 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
8 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
9 NAME Cas 1 G 02 06 07.9 +69 00 36     14.62     ~ 53 0
10 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
11 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
12 ESO 206-20A G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1190 0
13 NGC 2363A HII 07 28 42.8 +69 11 21           ~ 588 3
14 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
15 UGCA 133 G 07 34 11.5 +66 52 47 16.40 15.48 14.80 14.76   ~ 93 0
16 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
17 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
18 Z 311-8 GiG 08 34 07.20 +66 10 54.0 15.39 15.03 14.70 14.49   ~ 357 2
19 Z 331-51 GiG 08 37 03.00 +69 46 31.0 15.70 15.46 14.98 14.89   ~ 316 0
20 Z 332-57 LSB 09 40 32.33 +71 10 56.0 14.53 14.00 13.66 13.41   ~ 372 1
21 NAME F8D1 G 09 44 47.1 +67 26 19   14.60 13.85     ~ 80 0
22 NGC 2976 GiG 09 47 15.458 +67 54 58.97 11.77 11.03 10.16 9.51   ~ 712 1
23 NAME F12D1 G 09 50 10.0 +67 30 24   15.6       ~ 58 1
24 LEDA 28411 G 09 51 50.1 +72 05 00           ~ 14 0
25 LEDA 28529 G 09 53 48.8 +68 58 09   18.89       ~ 97 1
26 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
27 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
28 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
29 LEDA 28731 G 09 57 02.7 +68 35 30   15.17       ~ 119 1
30 MCG+12-10-012 AG? 09 57 32.8632 +69 02 50.735 15.19 15.15 14.10 14.12   ~ 327 4
31 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 808 0
32 LEDA 29231 G 10 04 40.3 +68 15 20   17.43 16.72     ~ 77 0
33 UGC 5428 AG? 10 05 06.40 +66 33 32.0 17.89 16.82 16.09 15.73   ~ 113 1
34 UGC 5442 AG? 10 07 01.90 +67 49 39.0 17.09 15.73 15.07 14.81   ~ 95 1
35 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
36 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
37 DDO 78 G 10 26 27.9 +67 39 24   15.8       ~ 88 1
38 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 703 1
39 Z 333-35 GiG 10 30 35.03 +70 37 07.2 14.81 13.69 13.01 12.73   ~ 140 0
40 LEDA 31286 G 10 34 31.9 +66 00 42   16.7       ~ 52 1
41 MCG+11-13-039 GiG 10 49 36.412 +65 32 01.07 15.55 15.27 14.79 14.55   ~ 170 0
42 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
43 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
44 Z 315-26 AG? 12 14 08.40 +66 05 41.0   14.60       ~ 89 1
45 NGC 4236 GiG 12 16 42.118 +69 27 45.25 10.97 10.58 10.08 9.90   ~ 415 1
46 Z 316-9 AG? 13 06 24.85 +67 42 25.0 14.08 13.61 13.08 12.98   ~ 268 1
47 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
48 Z 300-12 G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1428 1
49 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
50 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
51 M 2 GlC 21 33 27.02 -00 49 23.7     6.25     ~ 1114 1
52 NAME Pisces II G 22 58 31.0 +05 57 09     16.3     ~ 283 0
53 Z 431-72 G 23 28 35.2 +14 44 35 13.85 13.16 12.52     ~ 499 1
54 NAME Local Group GrG ~ ~           ~ 9325 0

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